Collision of ‘Baby’ Galaxies Resulted in Formation of Massive Galaxies : Research
The Niels Bohr Institute has come up with a new findings suggesting that the huge galaxies that existed along time back were actually formed by collision other small 'baby' galaxies. The galaxy continues to grow larger with the formation of new stars. Moreover, the collision with the neighboring galaxies results in formation of new, larger galaxies.
Galaxies are massive collection of stars, gas and dark matter. The number of stars in smallest and largest galaxies varies from a few million to several hundred billion respectively. Stars are generally made up of gases and very first stars emerged nearly 200 million years after the Big Bang. Helium and hydrogen were the main constituents of these stars.
When the huge clouds of gas and dust contract and the gases are so dense that the pressure is capable of heating the matter, it results into the formation of lustrous gas balls i. e. the origin of new stars.
The process of the star formation continues till the presence of gas in the galaxy. Sune Toft, astrophysicist? at the Niels Bohr Institute, who was involved with the study, was astonished by the size of these galaxies, which were as huge as today's spiral galaxies and the largest elliptical galaxies. Another surprising thing was that the stars were compressed into a very small area, which resulted in the smaller size galaxies.
Sune Toft, Dark Cosmology Centre at the Niels Bohr Institute at the University of Copenhagen told, "I discovered that there was a direct evolutionary link between two of the most extreme galaxy types we have in the universe". These two galaxies were the most far-off and most intense star forming galaxies which are formed soon after the Big Bang.
The revelation has been published in the scientific journal, Astrophysical Journal.
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